Familiarity with the performance characteristics and types of refractory bricks


Brick has been one of the most popular building materials since ancient times. Ordinary bricks are prone to cracking at high temperatures and are not suitable for rooms with high temperatures. In this case, the traditional brick is often replaced with refractory bricks. Refractory bricks are special types of bricks that can withstand high temperatures. This article is about refractory bricks, their types and properties.

What is refractory brick?

A refractory brick is a brick that is resistant to high temperatures. It is also called ceramic brick or refractory brick. As a rule, they are yellow-white in color. These bricks have good heat resistance and good compressive strength. The chemical composition of refractory bricks is different from conventional bricks. It is mainly composed of 25-30% alumina and 60-70% silica. In addition, there are oxides of magnesium, calcium, potassium and the like. The main application of refractory bricks is the construction of furnaces and so on. They are able to withstand temperatures above 2100 degrees Celsius. Thus, heat capacity helps the structure to remain stable at high temperatures.

Refractory brick price

Refractory bricks made of different materials have different prices. For detailed refractory brick prices, you can enter the construction cost website, select the market price at the top of the page, and then select wall bricks, floor tiles, flooring, and carpets in the middle category. Materials, you can check the market price various bricks.

Characteristics of refractory bricks

1. Refractory bricks must be resistant to high temperatures. 2. They have good compressive strength. 3. The refractory brick weight is 150 pounds per cubic foot. 4. Refractory brick size 9 x 4.5 x 2.5 inches or 9 x 2.7 x 2.25 inches. 5. They also have good chemical resistance as they do not react with the furnace gas. 6. Moisture absorption of refractory bricks is 5-10%. 7. They have a high melting point.

Types of refractory bricks

Refractory bricks come in a variety of sizes and shapes. There are three main types of refractory bricks

1. Acid refractory bricks

Acid-resistant bricks include silica bricks and refractory bricks with additives. Sand-lime brick consists of 93% silicon dioxide. They have good strength and melting points. In addition, they are hard and suitable for acid furnace linings. They withstand temperatures up to 2000 degrees Celsius. Silicate brick is made from sandstone or quartzite. Ganister brick is made up of 85% silica, 10% clay and 2% lime. They are also hard and can withstand temperatures up to 2100 degrees Celsius. But acid bricks are not designed to withstand high temperatures. Because they tend to flake off.

2. Alkaline refractory brick

Alkaline refractory bricks are alkaline. They have good corrosion and chemical resistance. They consist of magnesite brick, dolomite brick and bauxite brick. Magnesia bricks contain 85% magnesia and 3-5% iron oxide. They are suitable for lining furnaces. They can withstand temperatures from 1800 to 2100 degrees Celsius. Dolomite bricks can withstand temperatures from 1400 to 1600 degrees Celsius. Contains a large amount of dolomite. Bauxite brick is an alkaline refractory material that can withstand high temperatures up to 1600 degrees Celsius and contains 85% bauxite.

3. Neutral refractory brick

Neutral refractory bricks are suitable for separating the acid-base furnace lining. They consist of chromite brick, emery brick, spine brick and forsterite brick. These bricks contain a high proportion of chromium and magnesite.